ci : make release workflows use a deply key

.github/workflows/make-release.yml

@@ -22,6 +22,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v6
+        with:
+          ssh-key: ${{ secrets.DEPLOY_KEY_RELEASE }}
 
       - name: Run release checks
         id: checks

.github/workflows/release.yml

@@ -1598,6 +1598,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 0
+          ssh-key: ${{ secrets.DEPLOY_KEY_RELEASE }}
 
       - name: Determine tag name
         id: tag